Spark-arrester.



Patented Nov. 20, I900.

E. CORY.

SPARK ARRESTER.

[Application filed July 21, 1900.

(No Model.)

me norms Perms no. VHUYO-uTNO., wnsumcvom o c.

Warren STATES PATENT FFICE.

EBER CORY, OF BOONE COUNTY, INDIANA.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 662,114, dated November20, 1900.

Application filed July 21,1900 Serial No. 24,419. (No model.)

To all whom it may concern.-

Be it known that I, EBER CORY, a citizen of the United States, residingin the county of Boone and State of Indiana, have invented a new anduseful SparleArrester, of which the following is a specification.'

This invention relates to spark-arresters in general, and moreparticularly to that class used in connection with locomotive and othersteam boilers, one object of the invention being to provide aconstruction wherein the cinders will be returned from the top of thesmoke-stack to the bottom of the smoke-box, a further object of theinvention being to provide means for preventing clogging of theperforated top plate of the stack.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a sectional view taken vertically through a smoke-stack andshowing the present invention applied thereto. Fig. 2 is a top plan viewof the device applied to a smoke-stack upon a boiler and showing thehinged top or cap raised. Fig. 3 is a section on line 3 3 of Fig. 1.

Referring now to the drawings,5 represents a locomotive-boiler, at theforward end of which is the usual smoke-box 6, having the firetubes 7leading thereto, and upon the forward end of which boiler is fixed thesmoke-stack 8 through the medium of a base-flange 9 on the stack.

In the smoke-stack and concentric therewith is fixed a smoke-pipe 10,which leads from a point below the lower end of the stack to a pointbelow the upper end thereof, the upper end of the smoke-pipe beingflared, as shown at 11. to this flared portion 11 of the smoke-pipe,said partition flaring upwardly and having its upper edge fixed to theflare 13 of the stack 8, and at the upper end of the partition isdisposed a perforated disk 14:, which is the bottom of anupwardly-tapered cap 15, which is hinged at one edge to the edge of thepartition, this disk forming a foraminous cover for the upper end of thepipe. This hinged cap permits access when desired to the upper end ofthe smoke-pipe.

In the sides of the partition 12 are formed arcshaped openings 16,forming communica- A frusto-conical partition 12 is fixed tion betweenthe upper end of the stack and the interspace between it and thesmoke-pipe, so that when the boiler is in operation the dischargedcinders may rise through thesrnokepipe and, striking against theperforated disk, will fall back and 'pass down through the openings 16and between the stack and smokepipe into the smoke-box.

The exhaust-pipe 20is disposed below the smoke-pipe to dischargethereinto and force anupward draft therethrough, and in order that thefalling cinders may not come under theinfluence of the exhaust-steam tobe again carried up the smoke-pipe two partitions 21 and 22 are disposedin the interspace between the smoke-stack and the smoke-pipe and extendhelically from the rear side of the stack, at the upper end thereof, tothe front side at the lower end, so that the cinders will fall thereonand will be discharged from the lower end thereof into the front of thesmoke-box and beyond the exhaust-pipe. The cinders may be withdrawn fromthe smoke-box in the usual manner.

Those cinders which pass through the per forated disk or plate 14 willtend to lodge on the upper face of the disk after striking theconvergent sides of the cap, and to prevent them from thus collectingand clogging the perforations a rotatable scraper is provided.

This scraper comprises arms 25 and 26, which lie'against the under faceof the disk and extend radially from a rotatable shaft 27, which isjournaled in a bearing formed centrally of the disk and in a secondbearing upon a bracket 29 adjacent to the lower end of the smoke-pipe,said shaft lying concentric with the smoke-pipe, as shown. At the lowerend of the shaft is fixed a bevel-gear 30, with which meshes a gear 31,carried by a shaft 32, passed inwardly through the sides of thesmoke-stack and smoke-pipe,and which shaft has a belt-wheel 33 at itsouter end to receive a belt to rotate the shaft and correspondingly movethe scraper-arms.

It will be understood that in practice various modifications of thespecific construction shown may be made and that any suitable materialsand proportions may be used for the various parts without departing fromthe spirit of the invention.

WVhat is claimed is- 1. A spark-arrester comprising a stack, a tom, asmoke-pipe within and concentric with pipe disposed within and spacedfrom the walls of the stack, a for-aminous cover for the pipe, openingsleading from the pipe .to the stack below the cover, scraper-armsrotatably mounted against the cover and means for rotating the arms.

2. A spark-arrester comprising a stack, a

smoke-pipe within the stack and separated therefrom by an interspace, aforaminous cover for the pipe, openings leading from the pipe to theinterspaee, below thecover, scraper-arms rotatably mounted against thecover, means for rotating the arms, and par titions between the pipe andstack and disposed to convey cinders spirally from the rear of the stackto the front side thereof.

3. In a locomotive-boiler, the combination with the smoke-box of a stackmounted thereon and communicating therewith, an upwardly-tapered cap forthe stack and hinged thereto, said cap having a foraminous botthe stack,an upwardly-flaring partition connecting the upper ends of the stack andpipe, said partition having openings therein to conneot the pipe withthe int-erspace between it and the stack, spirally-disposed partitionsdisposed between the pipe and stack andleading from the upper end of thestack at the rear to the lower end at the front thereof, said pipeextending below the stack and into the smoke-box, an exhaust-pipe belowthe pipe .to exhaust thereinto and scraper-arms rotatably mountedagainst the perforated bottom of the cap and having means for operatingthem.

In testimony that I claim the foregoing as my own I have hereto aifixedmy signature in the presence of two witnesses.

EBER CORY.

Witnesses:

WM. H. BUNDAY, CHARLIE BRAY.

